What are impressions?
Impressions are the number of times your ad, post or content is displayed.
When you run an ad campaign or social media account, you should be able to see how many impressions your ad or content had over a given time period
Impressions do not necesarilly mean that a person actually looked at it. They might be looking at something else, or the ad or content was loaded, but not viewed, because it was not on the customer's screen. Nonetheless, looking at your impressions gives you a good idea whether your ad or content is being shown to people.